native gRPC failed invocations rate metric

[murlock1000]

Feature Description

Implement native metric for the rate of failed gRPC invocations, similar to http_req_failed.

Suggested Solution (optional)

Rate calculated as follows:

response = client.invoke()
grpc_req_failed.add(response.status === grpc.StatusOK);

Already existing or connected issues / PRs (optional)

No response

[olegbespalov]

Hi @murlock1000 !

Sorry for the slow response :cry:

Could you please describe the use case? I'm trying to understand better why you want to see the native metric instead of using the custom one. Thanks!

[murlock1000]

I would expect feature parity between http and grpc metrics. It would also be used for setting up native instead of custom thresholds.